The first, a 3.0 magnitude earthquake, occurred at 1:45 a.m. near the town of Chandler. That was followed by a 4.3 magnitude earthquake at 1:56, felt near the town of Luther. A 2.9 magnitude earthquake struck at 2:15 a.m., felt near the town of Boley, about 54 miles east of Oklahoma City, the Oklahoman reported. At 2:16 a.m., a 3.3 magnitude earthquake shook the towns of Luther and Edmond.

The fifth quake, a 4.2 magnitude shaker, hit east of Luther at 5:16 a.m.

“At this point, it looks like a main shock, aftershock sequence. There are even a bunch of smaller ones,” Austin Holland, a geophysicist at the Oklahoma Geological Survey in Norman, told the Oklahoman.

The largest earthquake to ever hit Oklahoma was a 5.7 magnitude quake that shook the town of Prague in Nov. 2011, injuring two people were injured and destroying 14 homes, the Christian Science Monitor reported.